Model of the final borehole geometry for helical laser drilling
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Alexander Kroschel
Alexander Kroschel studied Mechanical Engineering at the Ilmenau University of Technology, Germany. Since 2016, he is a doctoral student at the University of Stuttgart, Germany, and Robert Bosch GmbH. His research topic is on laser drilling with ultrashort laser pulses.
,
Andreas Michalowski
Abstract
A model for predicting the borehole geometry for laser drilling is presented based on the calculation of a surface of constant absorbed fluence. It is applicable to helical drilling of through-holes with ultrashort laser pulses. The threshold fluence describing the borehole surface is fitted for best agreement with experimental data in the form of cross-sections of through-holes of different shapes and sizes in stainless steel samples. The fitted value is similar to ablation threshold fluence values reported for laser ablation models.
About the author
Alexander Kroschel studied Mechanical Engineering at the Ilmenau University of Technology, Germany. Since 2016, he is a doctoral student at the University of Stuttgart, Germany, and Robert Bosch GmbH. His research topic is on laser drilling with ultrashort laser pulses.
Acknowledgments
The authors wish to thank Satoshi Oyama from Canon Europa N.V., Yukihiro Inoue from Canon Inc., and Matthias Reuter from Nexlase GmbH for getting the possibility to use a five-axis scan system from Canon Inc. to conduct the validation experiments. They would also like to thank Franziska Bauer and Adina Kanstinger for their experimental support.
References
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©2018 THOSS Media & De Gruyter, Berlin/Boston
Artikel in diesem Heft
- Cover and Frontmatter
- Views
- Disruptive: making lenses in a foundry
- Community
- News
- Topical Issue: Ultrafast Laser Matter Interaction
- Editorial
- The ultrafast laser is gearing up to become a tool for high-precision mass production – opportunities and challenges
- Review Articles
- Ablation dynamics – from absorption to heat accumulation/ultra-fast laser matter interaction
- Heat input and accumulation for ultrashort pulse processing with high average power
- Residual heat generated during laser processing of CFRP with picosecond laser pulses
- Ultrafast Bessel beams: advanced tools for laser materials processing
- Research Articles
- Residual heat during laser ablation of metals with bursts of ultra-short pulses
- Model of the final borehole geometry for helical laser drilling
- Atomistic simulations of ultra-short pulse laser ablation of aluminum: validity of the Lambert-Beer law
Artikel in diesem Heft
- Cover and Frontmatter
- Views
- Disruptive: making lenses in a foundry
- Community
- News
- Topical Issue: Ultrafast Laser Matter Interaction
- Editorial
- The ultrafast laser is gearing up to become a tool for high-precision mass production – opportunities and challenges
- Review Articles
- Ablation dynamics – from absorption to heat accumulation/ultra-fast laser matter interaction
- Heat input and accumulation for ultrashort pulse processing with high average power
- Residual heat generated during laser processing of CFRP with picosecond laser pulses
- Ultrafast Bessel beams: advanced tools for laser materials processing
- Research Articles
- Residual heat during laser ablation of metals with bursts of ultra-short pulses
- Model of the final borehole geometry for helical laser drilling
- Atomistic simulations of ultra-short pulse laser ablation of aluminum: validity of the Lambert-Beer law
